Improvement in gas pipes and fixtures



1. & T. 0. RICHARDSON.

Gas-Pipes and Fixtures;-

Patented June 24.1873.

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4% WJW AM PIiOTO-LITHOGRAPHIC 00. N1 oseoRA/s's amass) UNITE STATESPATENT, FFICE.

JOHN RICHARDSON AND THOMAS D. RICHARDSON, OF NEW YORK, N. Y.

IMPROVEMENT IN GAS PIPES AND FIXTURES.

Specification formingpart of Letters Patent No. 140,165, dated June 24,1873; application filed November 16, 1872.

To all whom ti may concern:

Be it known that we JOHN RICHARDSON and THOMAS D. RICHARDSON, of NewYork, in the county of New York and State of New York, have inventedcertain Improvements in Gas Pipes and Fixtures, of which the followin gis a specification.

Our invention relates to gas pipes and fixtures for oxy-hydrogen andsimilar lights, which require two gases to be conducted separately tothe burner, and the invention consists in mounting the pipe whichconveys one of the gases concentrically within the pipe which conveysthe other gas, and in constructing the elbows, swivels, and couplings,in a manner to correspond, so that the fixtures present the sameappearance as those of the ordinary construction which convey but onegas.

Figure 1 is a vertical central section through a chandelier constructedon our plan. Fig. 2 is a horizontal section of the same on the line asm. Fig. 3 is a vertical section through a swivel-bracket constructed onour plan. Figs. 4, 5, and 6 are elbows and joints to be used with ourpipe. Fig. 7 is a vertical central section through a drop or extensionjoint made on our plan. Fig. 8 is a crosssection of our pipe; and Fig. 9is a view of one of the washers or spiders which hold the inner pipefast within the other. I

In constructing our pipe we provide a pipe, A, of suflicient size toconvey one of the gases, and insert it within a second pipe, B, whichshould be of such size that the annular space between it and the innerpipe will allow the proper flow of the other gas. The inner pipe wefasten concentrically in the other by means of washers or spiders G,which have a central hole, a, to admit the inner pipe and arms or pointsI) to bear against the inner sgurface of the outer pipe 13, as shown inFig. These washers or spiders may be inserted loosely, or fastened inany suitable manner. It is preferred, however, to secure them on thesmall tube before it is inserted within the other, so that it will carrythem in to their proper positions and hold them there. It is, of course,immaterial in what form the spiders are made, provided they hold thecentral pipe in position, and do not materially obstruct the flow of thegas through the annular space between the pipes.

It will be seen that our double or compound pipe presents the sameexternal appearance as anordinary single pipe, but that it is at thesame time capable of conveying two different gases without allowing themto come in contact with each other.

In using our pipe we employ in connection therewith couplings, elbows,and joints of like construction--that is to say, composed of twoconcentric tubesso that they will convey the gases from one section ofpipe to another without allowing them to come in contact.

Fig. 6 represents a simple elbow, and Fig. 5 a T-piece, of ourconstruction. Fig. 4 represents a joint for making a connection betweentwo ordinary pipes carrying the separate gases, and our improved pipefor carrying both. This is of course intended for use only where all thepipes are stationary.

Where a swinging arm or bracket on our plan is to .be connected with twostationary supply-pipes, we connect it therewith by means of aswivel-joint, as shown in Fig. 3. This joint is the same as those of theordinary c011- struction, except that instead of having one passage ithas two, one communicating with the central and the other with the outertube of the arm or bracket.

When chandeliers are made on our plan the main pipe or pendant and thearms are all made of the two concentric tubes, and the central tube ofthe arms connected with the central tube of the pendant, as shown'inFigs. 1 and 2. By this arrangement the two gases are conveyed separatelythrough the arms to the burners.

Extension or drop lights may also be constructed of our pipe, as shownin Fig. 7, by arranging one section of pipe to slide teles copicallywithin another, in the same manner as is done with the ordinary singlepipe.

By means of suitable joints and connections our pipe may, it will beseen from the above, be employed for all purposes and in the same manneras the ordinary single pipe in common use. The different sections andfixtures may be screwed together or connected in any suit able manner.

Any suitable cock may, of course, be employed for controlling the flowof the gases, but it is considered preferable to use the one for whichwe have this day made an application, as it serves to control both gasesat the same time.

The pipe and fixtures constructed according to our invention enable usto provide brackets, chandeliers, and other burners and apparatus, whichpresent the same appearance as those of the ordinary construction, andat the same time convey the two gases separately.

In order to accomplish the same end with pipe of the ordinary form itbecomes necessary to use two parallel pieces, which render the burnersvery clumsy and objectionable in appearance, but by means of ourimprovements this objection is entirely avoided. Our pipe may also besetin place with far less trouble than two separate pipes, and may bearranged in many places where it would not be convenient or possible toarrange two separate ones.

While it is considered preferable to have the two tubes arrangedconcentrically it is not necessary, as the inner tube may be placedeccentrically, provided its ends are concentric with the other, in orderto allow the other sections or couplings to be screwed thereto.

Having thus described our invention, what we claim is 1. Theherein-described pipe for conducting two gases separately betweendistant points, consisting of two pipes secured one within the other,substantially as herein described, with their ends arrangedconcentrically, as set forth, so that different lengths or sections ofthe compound pipe may be screwed together and used in the same manner asordinary single pipe. r

2. The combination of the pipes A and B with the spiders C or theirequivalents, as and for the purpose described.

3. In combination with the compound pipe A B, the swivel D provided withthe two passages or openings, substantially as described.

JOHN RICHARDSON. THOS. D. RICHARDSON. Witnesses:

ALEX. MAsoN, JNo. VINCENT.

